The day in late 2020 Bob Senzig thought would be his last is still a haze and probably always will be. He remembers a doctor at a hospital in the resort town of Los Cabos, Mexico, talking on the phone with the crew of a medical evacuation jet coming to take him back home, to an emergency room at a U.S. hospital. But to get on board, he was told, the 66-year-old GE retiree would have to be intubated, a procedure that would require him to be unconscious. Make your phone calls quickly, the doctor told him.